Fl. 90-95 mm wide; perianth segments very broadly ovate, truncate, prominently mucronate, spreading, plane, overlapping half; the inner segments more narrowly ovate, creased; corona deeply split, the six segments one-third to half the length of the perianth segments, opposite and closely overlying them and of the same width, appearing to be continuous, strongly ribbed, yellow, shading to orange at rim, mouth with numerous overlapping lobes, irregularly frilled.